APA aipamena

(1995). Earth changes through time. Macmillian/McGraw-Hill school pub.

Chicago Style aipamena

Earth Changes Through Time. Macmillian/McGraw-Hill school pub, 1995.

MLA aipamena

Earth Changes Through Time. Macmillian/McGraw-Hill school pub, 1995.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.